Two-year-old babies suddenly always hiccups, may be due to the diaphragm development is not sound and other physiological reasons, may also be indigestion, digestive diseases and other pathological factors caused. 1. Physiological factors: two-year-old babies due to the diaphragm has not yet developed soundly, when eating too fast or often crying, will swallow too much air, resulting in spasms of the diaphragm, so the symptoms of frequent hiccups. 2. Pathologic factors: (1) indigestion: if you often eat stimulating or indigestible food, due to the two-year-old baby’s own digestive function is not yet sound, it is easy to have a decline in intestinal absorption function, causing indigestion, hiccups, constipation, diarrhea and other symptoms. (2) digestive diseases: if there is gastritis, enteritis and other digestive diseases, resulting in gastrointestinal mucosal inflammatory reaction, affecting the digestive function, will also trigger hiccups, belching (hiccups) and other symptoms. Two-year-old baby suddenly always hiccups, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.